Disconnect Neutrals NON grid tied solar with batteries AND generator

[grasfulls]

Single phase 120/240, 200 amps, residential. Client wants to be "almost" off grid. Has a solar array tied to inverter(s), batteries to inverter(s). Inverters use solar to feed loads AND charge batteries. Generator is used to charge batteries when solar is not enough. Utility is also connected to inverters but is not typically turned on, the feed is through a branch breaker. Part of the house is always on utility (AC and pump equipment). As long as the utility is connected to the inverter(s) or anything fed by the inverters, does the neutral from the utility need to be disconnected whenever the 2-pole 100 amp breaker from the utility to the inverter(s) is opened?
Utility is feeding three loads - AC, pump equipment, inverter assembly. The inverter assembly feeds all other house loads. It is programmed to use utility first, then solar, then batteries. They keep the 100-amp breaker feeding the inverters open to "force" the inverter to use solar and batteries.

 

[shortcircuit2]

I would think not. Generators are connected as non-seperately derived and the neutral is in common with the utility neutral.

Power will seek the source.

 

[grasfulls]

Thanks! I need to open my transfer switch, I think it may just be disconnecting the ungrounded conductors.

 

[ggunn]

Thanks! I need to open my transfer switch, I think it may just be disconnecting the ungrounded conductors.

All of them I have seen do that.

 

[wwhitney]

Thanks! I need to open my transfer switch, I think it may just be disconnecting the ungrounded conductors.

But the response was that's fine. No need to switch the neutral as long as there's only one neutral ground bond in the system. The generator should not have a neutral-ground bond.

Cheers, Wayne